In order for Community Builder to be able to notify Intellispire email pugins, you must install an additional Community Builder plugin.
1) Click Here to Download the Plugin
2) Navigate to the Community Builder Plugin management Page (Components | Community Builder | Plugin Management)
3) Install the plugin
4) Activate the plugin
Please note that this can be installed only from the Community Builder plugin management system - attempts to install using the standard Joomla! installer will cause a "Cannot find XML file" error.